| article html file updated | 8 February 2020 21:39 CET | Update | https://www.mdpi.com/2227-7099/5/4/43 |
| article html file updated | 28 September 2019 14:28 CEST | Update | - |
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| article html file updated | 20 November 2017 08:52 CET | Original file | - |
| article xml uploaded. | 20 November 2017 08:50 CET | Original file | https://www.mdpi.com/2227-7099/5/4/43/xml |
| article pdf uploaded. | 20 November 2017 08:50 CET | Version of Record | https://www.mdpi.com/2227-7099/5/4/43/pdf |
